<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <link rel="stylesheet" href="format.css" type="text/css" />
    <script src="https://cdn.bootcss.com/jquery/3.2.1/jquery.js"></script>
</head>
<body>
    <button id="btn">Add</button>
	<div id="a1">
		<ul>
			<li>item1</li>
			<li>item2</li>
			<li>item3</li>
		</ul>
	</div>
	<table id="users"></table>
	<script type="text/javascript" src="run.js"> </script>
</body>
</html>